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  • Should UTF-16 be considered harmful?

    - by Artyom
    I'm going to ask what is probably quite a controversial question: "Should one of the most popular encodings, UTF-16, be considered harmful?" Why do I ask this question? How many programmers are aware of the fact that UTF-16 is actually a variable length encoding? By this I mean that there are code points that, represented as surrogate pairs, take more than one element. I know; lots of applications, frameworks and APIs use UTF-16, such as Java's String, C#'s String, Win32 APIs, Qt GUI libraries, the ICU Unicode library, etc. However, with all of that, there are lots of basic bugs in the processing of characters out of BMP (characters that should be encoded using two UTF-16 elements). For example, try to edit one of these characters: 𝄞 (U+1D11E) MUSICAL SYMBOL G CLEF 𝕥 (U+1D565) MATHEMATICAL DOUBLE-STRUCK SMALL T 𝟶 (U+1D7F6) MATHEMATICAL MONOSPACE DIGIT ZERO 𠂊 (U+2008A) Han Character You may miss some, depending on what fonts you have installed. These characters are all outside of the BMP (Basic Multilingual Plane). If you cannot see these characters, you can also try looking at them in the Unicode Character reference. For example, try to create file names in Windows that include these characters; try to delete these characters with a "backspace" to see how they behave in different applications that use UTF-16. I did some tests and the results are quite bad: Opera has problem with editing them (delete required 2 presses on backspace) Notepad can't deal with them correctly (delete required 2 presses on backspace) File names editing in Window dialogs in broken (delete required 2 presses on backspace) All QT3 applications can't deal with them - show two empty squares instead of one symbol. Python encodes such characters incorrectly when used directly u'X'!=unicode('X','utf-16') on some platforms when X in character outside of BMP. Python 2.5 unicodedata fails to get properties on such characters when python compiled with UTF-16 Unicode strings. StackOverflow seems to remove these characters from the text if edited directly in as Unicode characters (these characters are shown using HTML Unicode escapes). WinForms TextBox may generate invalid string when limited with MaxLength. It seems that such bugs are extremely easy to find in many applications that use UTF-16. So... Do you think that UTF-16 should be considered harmful?

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  • How to render Asian characters in a PDF using xhtmlrenderer

    - by Mark Derricutt
    I was wondering what steps were needed to render Asian characters using the java based xhtmlrenderer (flying saucer) library? I am wanting to render the following: <html> <body>????????</body> </html> Without any font settings being added to the HTML this renders fine in normal browsers, but I can't find anyway to render this to PDF using the iTextRenderer portion of xhtmlrenderer. After following various threads on the mailing list, I see lots of posts talking about adding .TTF files from the c:\windows\fonts directory, and I have modified the examples to run on linux ( https://gist.github.com/643173745182c9becc57 ), which shows me various fonts being displayed, but I don't see any Asian glyffs. Does anyone have any decent pointers, or clean solutions to this problem? Or am I looking at the wrong problem with a really simple solution elsewhere?

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  • Drupal node_save and special characters.

    - by Pierre
    Hello, i'm trying to create nodes and taxonomy terms through a custom php script by using the node_save() function. I'm working on drupal 6. It's working well (thanks to previous questions on stackoverflow) except for accented letters. Indeed, when a title or a taxonomy term contain "é", "è" or "à", the sentence is cut before those special characters. For example, a title like that: "Bonjour les éléphants" will create a node with "Bonjour les " as title. I don't know if it's linked to my database or if i have to use a special encoding in php (iconv() blabla) The fact is, for drupal titles, i can not use html encoding (for example: é is é in html) because drupal will render &eacute and not é... When i create a taxonomy or a title manually, i have no problems and the accented letter is saved in the database as "é". Soo if you can help me to create terms and title with accented letters, that will be great : ) Thank you !

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  • Cyrillic characters from javascript cookie to php output via $_COOKIE

    - by Beck
    When i'm trying to put russian text in cookie via javascript and then output it via php it returns: %u043F%u0440%u043E%u0432%u0435%u0440%u043A%u0430 How to decode this to normal cyrillic characters? This is the function i'm using to pass to document.cookie: function setCookie(c_name,val,c_expiredays,c_path,c_domain,c_secure) { var exdate=new Date(); exdate.setDate(exdate.getDate()+c_expiredays); document.cookie=c_name+ "=" +escape(val)+ /* Additional settings */ ((c_path) ? "; path=" + c_path : "") + ((c_domain) ? "; domain=" + c_domain : "") + // used to allow using only on a certain domain ((c_secure) ? "; secure" : "") + // used for HTTPS (SSL) ((c_expiredays==null) ? "" : ";expires="+exdate.toGMTString()); } setCookie('name',$(this).val(),1); On server side, i'm outputting like that: (isset($_COOKIE['img_href_value']) ? $_COOKIE['img_href_value'] : '')

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  • CodeIgniter - Disallowed Key Characters via $_GET

    - by rkj
    I am getting echoed "Disallowed Key Characters." in my CodeIgniter when I have a http_cookie sent via GET from a SSL relay site (a payment gateway) to my application. My question is if there's any way that I can get this http_cookie through this "_clean_input_keys" method that cause this Disallowed-message and exits? The parameter contains a getenv("HTTP_COOKIE") set into a hidden input and needs to be used to keep the session alive even though it will be sent to the relay site and back again. The HTTP_COOKIE string looks like: &HTTP_COOKIE=PHPSESSID=775572c8c3b161bc957281aa901eb09c;%20ci_session=a%3A4%3A{s%3A10%3A%22session_id%22%3Bs%3A32%3A%229666689e0c8e4f26fb38889351765304%22%3Bs%3A10%3A%22ip_address%22%3Bs%3A14%3A%2127.0.0.1%22%3Bs%3A10%3A%22user_agent%22%3Bs%3A50%3A%22Mozilla%2F5.0+%28Macintosh%3B+U%3B+Intel+Mac+OS+X+10.6%3B+da%22%3Bs%3A13%3A%22last_activity%22%3Bs%3A10%3A%221271145332%22%3B}d9b9df5d8a0b51f303cbe6bb4bbe497e

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  • Java char literal to C# char literal

    - by Kristoffersen
    Hi. I am maintaining some Java code that I am currently converting to C#. The Java code is doing this: sendString(somedata + '\000'); And in C# I am trying to do the same: sendString(somedata + '\000'); But on the '\000' VS2010 tells me that "Too many characters in character literal". How can I use '\000' in C#? I have tried to find out what the character is, but it seems to be " " or some kind of newline-character. Do you know anything about the issue? Thanks!

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  • Double-byte characters in querystring using PHP

    - by Jeffrey Berthiaume
    I'm trying to figure out how to create personalized urls for double-byte languages. For example, this url from Amazon Japan has Japanese characters within the querystring (specifically, the path): http://www.amazon.co.jp/????????-DVD-???/dp/B00005R5J3/ref=sr_1_3?ie=UTF8&s=dvd&qid=1269891925&sr=8-3 What I would like to do is have: http://www.mysite.com/???????? or even http://www.mysite.com/index.php?name=???????? be able to properly decode the $GET[name] string. I think I have tried all of the urldecode and utf8_decode possibilities, but I just get gibberish in response. This all works fine in a form $_POST, but I need these urls to be emailable...

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  • propertyregex removes return characters in multiline

    - by javydreamercsw
    I'm using ants propertyregex method to change a property and it works fine up to a point. I'm lossing return characters. Here's what I'm trying to change: cluster.path=\ ${nbplatform.active.dir}/harness:\ ${nbplatform.active.dir}/platform:\ ${nbplatform.active.dir}/nb This is in a .properties file. So I'm trying to change it like this: <propertyregex property="cluster.path" input="${cluster.path}" regexp="nbplatform.active.dir" replace="xplatform.base" global="true" override="true"/> The stuff is replaced but I get: cluster.path= ${xplatform.base}/harness\: ${xplatform.base}/platform\: ${xplatform.base}/nb This brakes logic down the line not controlled by me (Netbeans) that uses the ':' as delimiter. Any idea?

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  • Why are these strange characters appearing in mcrypt?

    - by David
    I Encrypt and Decrypt successfully, but when I decrypt the value, appears strange characters at the final of string "???": The initial $_POST['value'] do not have any blank space or any strange character Any idea to solve this? Encrypt with this: $key='my key'; $td = mcrypt_module_open('tripledes', '', 'ecb', ''); $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND); mcrypt_generic_init($td, $key, $iv); $id = mcrypt_generic($td, $_POST['value']); mcrypt_generic_deinit($td); mcrypt_module_close($td); Decrypt with this: $key='my key'; $td = mcrypt_module_open('tripledes', '', 'ecb', ''); $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND); mcrypt_generic_init($td, $key, $iv); $id = mdecrypt_generic($td, $_COOKIE['value']); mcrypt_generic_deinit($td); mcrypt_module_close($td);

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  • Sending Illegal XML Characters in Soap Request

    - by SK
    I am trying to send special (&, ' (single quote)) characters in the Soap Request. I am using axis 1.4. The webservice client is in weblogic server and the webservice server is an ibm mainframe (COBOL program). The request data from the client contains special character (& symbol) which is converted to &amp; I tried to enclose it with CDATA as <![CDATA[Some Name & Some Data ]]> which got converted to &lt;![CDATA[Some Name &amp; Some Data]]&gt; The webservice client is generated from wsdl, so I couldn't use CDATA api to construct the request. I am able to set it as string value, and it is getting converted. Any help on this would be greatly appreciated. Please let me know if you need any more information on this.

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  • Visual Studio Team System 2008 - messy formatting/control characters/marks in source code

    - by AL
    Hi, I don't know what I did but somehow the IDE has started displaying a green dot whenever I press spacebar and a green arrowhead whenever I press TAB. The source has become littered with these characters all over and I am finding it very difficult to code in the presence of so many formatting marks. I have tried to search a solution on Google but couldn't perhaps enter the right keywords so haven't been able to fix the behavior. Is there any way I can stop VS2008 IDE from littering my source code with these green dots and arrowheads whenever I press spacebar/tab? I would be really thankful for this help. Thanks, -AL

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  • Problem with Japanese/International Characters with IIS7 URL Rewrite

    - by percent20
    I have a friend with a Japanese blog, using wordpress, he has the pretty url. Basically domain.com/postname. Well an example of a url might be. "domain.com/???". His blog is hosted on an Apache web server. I am running IIS7 and am trying to get my Japanese blog going like it should, and have "domain.com/???" show just that one post when you visit that url. My thinking is it has something to do with url-encoding. I can't find too much information on utf-8 or anything about getting international characters to work in a url. Any help on this would be great. I am thinking I should change something in the web.config file, but not to sure. I haven't had a lot of experience with IIS7. Thanks.

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  • How to insert random characters in a text file at random positions using C

    - by Shantanu Gupta
    I m writing a program to insert random characters in a text file in between the text so that no one can understand this text. eg. suppose this is my text file a.txt with content as "Hi my name is abc. I like to play XYZ" Now i will cal a random function in C and get the 26 modulus random no to get the character to be inserted at random position. eg. "Him mayn mae lkd". etc How can i insert this random character in between the file.

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  • RegEx - Take all numeric characters following a text character

    - by Simon
    Given a string in the format: XXX999999v99 (where X is any alpha character and v is any numeric character and v is a literal v character) how can I get a regex to match the numeric characters following the v? So far I've got 'v\d\d' which includes the v but ideally I'd like just the numeric part. As an aside does anyone know of a tool in which you can specify a string to match and have the regex generated? Modifying an existing regex is one thing but I find starting from scratch painful! Edit: Re-reading this question I realise it reads like a homework assignment! However I can assure you it's not, the strings I'm trying to match represent product versions appended to product codes. The current code uses all sorts of substring expressions to retrieve the version part.

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  • help with django and accented characters?

    - by Asinox
    Hi guys, i have a problem with my accented characters, Django admin save my data without encoding to something like "&aacute;" Example: if im trying a word like " Canción ", i would like to save in this way: Canci&oacute;n, and not Canción. im usign Sociable app: {% load sociable_tags %} {% get_sociable Facebook TwitThis Google MySpace del.icio.us YahooBuzz Live as sociable_links with url=object.get_absolute_url title=object.titulo %} {% for link in sociable_links %} <a href="{{ link.link }}"><img alt="{{ link.site }}" title="{{ link.site }}" src="{{ link.image }}" /></a> {% endfor %} But im getting error if my object.titulo (title of the article) have a accented word. aught KeyError while rendering: u'\xfa' Any idea ? i had in my SETTING: DEFAULT_CHARSET = 'utf-8' i had in my mysql database: utf8_general_ci thanks, sorry with my English

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  • jQuery AJAX call undefined error with special characters

    - by David
    Hi, I tried to make an AJAX call using jQuery, the data has special characters, e.g {'data':'<p>test</p>'}. It seems failed to pass this data in the first place. It will work if i just pass {'data':'test'}. encodeURIComponent and JSON.stringify failed here due to the special character < > /. Could anyone please help with it? Thanks. $.ajax({ type: "POST", url: "services.aspx", data: "data=" + encodeURIComponent(JSON.stringify(obj)), dataType: "text", error: function(xhr, textStatus, errorThrown) { alert("ERROR"); }, success: function(data) { } }); Regards, David

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  • replace characters which do not matches the ones in a regex

    - by Cristian Boariu
    Hi, I have this regex: private static final String SPACE_PATH_REGEX ="[a-z|A-Z|0-9|\\/|\\-|\\_|\\+]+"; I check if my string matches these regex and IF NOT, i want to replace all characters which are not here, with "_". I;ve tried like: private static final String SPACE_PATH_REGEX_EXCLUDE ="[~a-z|A-Z|0-9|\\/|\\-|\\_|\\+]+"; if (myCompanyName.matches(SPACE_PATH_REGEX)) { myNewCompanySpaceName = myCompanyName; } else{ myNewCompanySpaceName = myCompanyName.replaceAll(SPACE_PATH_REGEX_EXCLUDE, "_"); } but does not work..., so in the 2nd regex "~" seems to not omit the following chars. Any ideea?

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  • Can HTTP URIs have non-ASCII characters?

    - by Cheeso
    I tried to find this in the relevant RFC, IETF RFC 3986, but couldn't figure it. Do URIs for HTTP allow Unicode, or non-ASCII of any kind? Can you please cite the section and the RFC that supports your answer. NB: For those who might think this is not programming related - it is. It's related to an ISAPI filter I'm building. Addendum I've read section 2.5 of RFC 3986. But RFC 2616, which I believe is the current HTTP protocol, predates 3986, and for that reason I'd suppose it cannot be compliant with 3986. Furthermore, even if or when the HTTP RFC is updated, there still will be the issue of rationalization - in other words, does an HTTP URI support ALL of the RFC3986 provisos, including whatever is appropriate to include non US-ASCII characters?

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  • How to use strange characters in a query string

    - by peter
    I am using silverlight / ASP .NET and C#. What if I want to do this from silverlight for instance, // I have left out the quotes to show you literally what the characters // are that I want to use string password = vtakyoj#"5 string encodedPassword = HttpUtility.UrlEncode(encryptedPassword, Encoding.UTF8); // encoded password now = vtakyoj%23%225 URI uri = new URI("http://www.url.com/page.aspx@password=vtakyoj%23%225"); HttpPage.Window.Navigate(uri); If I debug and look at the value of uri it shows up as this (we are still inside the silverlight app), http://www.url.com?password=vtakyoj%23"5 So the %22 has become a quote for some reason. If I then debug inside the page.aspx code (which of course is ASP .NET) the value of Request["pasword"] is actually this, vtakyoj#"5 Which is the original value. How does that work? I would have thought that I would have to go, HttpUtility.UrlDecode(Request["pswd"], Encoding.UTF8) To get the original value. Hope this makes sense? Thanks.

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  • replace characters which do not match with the ones in a regex

    - by Cristian Boariu
    Hi, I have this regex: private static final String SPACE_PATH_REGEX ="[a-z|A-Z|0-9|\\/|\\-|\\_|\\+]+"; I check if my string matches this regex and IF NOT, i want to replace all characters which are not here, with "_". I've tried like: private static final String SPACE_PATH_REGEX_EXCLUDE = "[~a-z|A-Z|0-9|\\/|\\-|\\_|\\+]+"; if (myCompanyName.matches(SPACE_PATH_REGEX)) { myNewCompanySpaceName = myCompanyName; } else{ myNewCompanySpaceName = myCompanyName.replaceAll( SPACE_PATH_REGEX_EXCLUDE, "_"); } but it does not work..., so in the 2nd regex "~" seems to not omit the following chars. Any idea?

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  • Serializing chinese characters with Xerces 2.6

    - by Gianluca
    I have a Xerces (2.6) DOMNode object encoded UTF-8. I use to read its TEXT element like this: CBuffer DomNodeExtended::getText( const DOMNode* node ) const { char* p = XMLString::transcode( node->getNodeValue( ) ); CBuffer xNodeText( p ); delete p; return xNodeText; } Where CBuffer is, well, just a buffer object which is lately persisted as it is in a DB. This works until in the TEXT there are just common ASCII characters. If we have i.e. chinese ones they get lost in the transcode operation. I've googled a lot seeking for a solution. It looks like with Xerces 3, the DOMWriter class should solve the problem. With Xerces 2.6 I'm trying the XMLTranscoder, but no success yet. Could anybody help?

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  • Find all words containing characters in UNIX

    - by fahdshariff
    Given a word W, I want to find all words containing the letters in W from /usr/dict/words. For example, "bat" should return "bat" and "tab" (but not "table"). Here is one solution which involves sorting the input word and matching: word=$1 sortedWord=`echo $word | grep -o . | sort | tr -d '\n'` while read line do sortedLine=`echo $line | grep -o . | sort | tr -d '\n'` if [ "$sortedWord" == "$sortedLine" ] then echo $line fi done < /usr/dict/words Is there a better way? I'd prefer using basic commands (instead of perl/awk etc), but all solutions are welcome! To clarify, I want to find all permutations of the original word. Addition or deletion of characters is not allowed.

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